org.eclipse.swt.snippets.Snippet300.java Source code

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Here is the source code for org.eclipse.swt.snippets.Snippet300.java

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/*******************************************************************************
 * Copyright (c) 2000, 2013 IBM Corporation and others.
 *
 * This program and the accompanying materials
 * are made available under the terms of the Eclipse Public License 2.0
 * which accompanies this distribution, and is available at
 * https://www.eclipse.org/legal/epl-2.0/
 *
 * SPDX-License-Identifier: EPL-2.0
 *
 * Contributors:
 *     IBM Corporation - initial API and implementation
 *******************************************************************************/
package org.eclipse.swt.snippets;

/*
 * example snippet: drag and drop text between SWT and Swing
 *
 * For a list of all SWT example snippets see
 * http://www.eclipse.org/swt/snippets/
 *
 * @since 3.0
 */
import javax.swing.*;

import org.eclipse.swt.*;
import org.eclipse.swt.awt.*;
import org.eclipse.swt.dnd.*;
import org.eclipse.swt.graphics.Point;
import org.eclipse.swt.layout.*;
import org.eclipse.swt.widgets.*;

public class Snippet300 {

    public static void main(String[] args) {
        final Display display = new Display();
        final Shell shell = new Shell(display);
        shell.setText("SWT and Swing DND Example");
        GridLayout layout = new GridLayout(1, false);
        shell.setLayout(layout);

        Text swtText = new Text(shell, SWT.BORDER);
        swtText.setText("SWT Text");
        GridData data = new GridData(GridData.FILL_HORIZONTAL);
        swtText.setLayoutData(data);
        setDragDrop(swtText);

        Composite comp = new Composite(shell, SWT.EMBEDDED);
        java.awt.Frame frame = SWT_AWT.new_Frame(comp);
        JTextField swingText = new JTextField(40);
        swingText.setText("Swing Text");
        swingText.setDragEnabled(true);
        frame.add(swingText);
        data = new GridData(GridData.FILL_HORIZONTAL);
        data.heightHint = swingText.getPreferredSize().height;
        comp.setLayoutData(data);

        shell.setSize(400, 200);
        shell.open();
        while (!shell.isDisposed()) {
            if (!display.readAndDispatch())
                display.sleep();
        }
        display.dispose();
    }

    public static void setDragDrop(final Text text) {
        Transfer[] types = new Transfer[] { TextTransfer.getInstance() };
        int operations = DND.DROP_MOVE | DND.DROP_COPY | DND.DROP_LINK;

        final DragSource source = new DragSource(text, operations);
        source.setTransfer(types);
        source.addDragListener(new DragSourceListener() {
            Point selection;

            @Override
            public void dragStart(DragSourceEvent e) {
                selection = text.getSelection();
                e.doit = selection.x != selection.y;
            }

            @Override
            public void dragSetData(DragSourceEvent e) {
                e.data = text.getText(selection.x, selection.y - 1);
            }

            @Override
            public void dragFinished(DragSourceEvent e) {
                if (e.detail == DND.DROP_MOVE) {
                    text.setSelection(selection);
                    text.insert("");
                }
                selection = null;
            }
        });

        DropTarget target = new DropTarget(text, operations);
        target.setTransfer(types);
        target.addDropListener(new DropTargetAdapter() {
            @Override
            public void drop(DropTargetEvent event) {
                if (event.data == null) {
                    event.detail = DND.DROP_NONE;
                    return;
                }
                text.append((String) event.data);
            }
        });
    }
}